Hi there
As there is no duration of the problem given and nothing mentioned regarding fever, so assuming that there is no fever and no any associated problem as well as no past history of allergy, then just give this simple medication
* Syp Chlorhistol 2 ml three times daily for 3 days
* Normal Saline Nasal drops - 2 drops in each nostrils for 3 days .
Next Steps
Connect with me with other information and also if there is fever.